ASoC: fsl: fsl_spdif: Check for clk_prepare_enable() error

clk_prepare_enable() may fail, so we should better check its return value
and propagate it in the case of error.

Signed-off-by: Fabio Estevam <fabio.estevam@freescale.com>
Acked-by: Nicolin Chen <nicoleotsuka@gmail.com>
Signed-off-by: Mark Brown <broonie@kernel.org>

diff --git a/sound/soc/fsl/fsl_spdif.c b/sound/soc/fsl/fsl_spdif.c
index 8e93221..489fa86 100644 (file)
--- a/sound/soc/fsl/fsl_spdif.c
+++ b/sound/soc/fsl/fsl_spdif.c
@@ -482,13 +482,18 @@ static int fsl_spdif_startup(struct snd_pcm_substream *substream,
                mask = SCR_TXFIFO_AUTOSYNC_MASK | SCR_TXFIFO_CTRL_MASK |
                        SCR_TXSEL_MASK | SCR_USRC_SEL_MASK |
                        SCR_TXFIFO_FSEL_MASK;
-               for (i = 0; i < SPDIF_TXRATE_MAX; i++)
-                       clk_prepare_enable(spdif_priv->txclk[i]);
+               for (i = 0; i < SPDIF_TXRATE_MAX; i++) {
+                       ret = clk_prepare_enable(spdif_priv->txclk[i]);
+                       if (ret)
+                               goto disable_txclk;
+               }
        } else {
                scr = SCR_RXFIFO_FSEL_IF8 | SCR_RXFIFO_AUTOSYNC;
                mask = SCR_RXFIFO_FSEL_MASK | SCR_RXFIFO_AUTOSYNC_MASK|
                        SCR_RXFIFO_CTL_MASK | SCR_RXFIFO_OFF_MASK;
-               clk_prepare_enable(spdif_priv->rxclk);
+               ret = clk_prepare_enable(spdif_priv->rxclk);
+               if (ret)
+                       goto err;
        }
        regmap_update_bits(regmap, REG_SPDIF_SCR, mask, scr);
 
@@ -497,6 +502,9 @@ static int fsl_spdif_startup(struct snd_pcm_substream *substream,
 
        return 0;
 
+disable_txclk:
+       for (i--; i >= 0; i--)
+               clk_disable_unprepare(spdif_priv->txclk[i]);
 err:
        clk_disable_unprepare(spdif_priv->coreclk);